# Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this. 2x + 10y = 58 -14x + 8y = 140

91,718 questions, page 61
1. ## PURE MATHEMATICS

1. The complex number 'a' is such that a^2=5-12i use an algebraic method to find the two possible values of 'a' 8. The complex number z is given by z=cosTheta + isinTheta where -1/2pi< or equal to Theta less than or equal to 1/2pi. a. show that

asked by Kerry-Ann on September 13, 2013
2. ## chem engineering

Mass balance on an intravenous injection (IV) bag A nurse sets up an IV drip for a patient consisting of normal saline; assume that this is an aqueous solution containing 150mM salt. The saline drip is supplemented with an antibiotic solution; assume that

asked by Christina on October 28, 2009
3. ## algebra

1 1 7 -y - -= - 2 8 8 please help me! It isn't clear to me what this expression means. Can you clarify it? (one-half times "y") minus one-eighths equals seven-eighths or (1/2 * y)- 1/8= 7/8 solve the equation, then check your solution. Ok, this is how I

asked by Nikki-Ole on September 22, 2006
4. ## math

3/4-1/2n=4/5 Please don't give me the answer, just show me the steps to solve it

asked by Jamie on July 15, 2013
5. ## graphing

Can someone show me how to solve these inequalties for me? I cannot figure any of them out -6 < x and 3 < 6 (Remember this is an "and" statement) -3x < -6 or x + 5 < -2 x - 2 > 2x + 1 or -10 > -2x - 2

asked by mike on May 21, 2007
6. ## maths calculus need help plz

solve d^2y/dx^2+y=tanx show working plz i don't no it at all

asked by dams on September 20, 2016
7. ## algebra 2

linear combinations are confusing, please show how to solve -6x + 5y = 4 and 7x - 10y = -8

asked by felicia on January 17, 2016
8. ## maths

using the substitution p=1/x, q=1/y, solve simultaneous equations 1/x-5/y=y 2/x+1/y=s please could show all working

asked by favs on February 12, 2013
9. ## Trigonometry

The expression 2x^3(4-3x)-5x(x-2) is equal to? *Please show me the steps to solve this problem! Thanks!

asked by Katy on December 26, 2010
10. ## math

solve for w, P=2l+2w could you please show me how this is done and explain the rules. i'm hopelessly lost with this. thanks.

asked by jaycey on March 3, 2010
11. ## Chemistry

If you have 2.2x10^24 molecules of O2 at STP, how many liters of O2 do you have? Can someone show me how to solve this

asked by Samantha on November 20, 2017
12. ## math

The function f:x =2x+1/x-3 and g:x =1-x/2 a. For what value of x is 'f' undefined? b. Find 'f' inverse and hence solve f(x) =1/3. c.Show that fg(x) -gh(x).

asked by lindsay on December 7, 2012
13. ## Trigonometry

The expression 2x^3(4-3x)-5x(x-2) is equal to? *Please show me the steps to solve this problem! Thanks!

asked by Katy on December 26, 2010
14. ## MATH

Y^3+Y^2-4Y-4 AND T^2+4Z^2 THESE ARE FACTORING QUESTIONS CAN SOME ONE PLEASE SHOW ME THE STEP ON HOW TO SOLVE THESE TWO PROBLEMS

asked by mace on February 21, 2013
15. ## statistics

poisson distribution: please show and solve. # of purchases in the next 24 hours.

asked by lani on November 17, 2011
16. ## sixth grade math

How to express 12/15 as a fraction, percent, and decimal. Someone please show me how to solve.

asked by chris on November 12, 2014
17. ## math

4(x+4)=7(x-2) Can someone show me how to solve this. I have been working on it for about 1 hour and I can not get each side to match.

asked by barb on August 8, 2010
18. ## Algebra I?

((x-3)/(x+1)) > 5 I get x < - 2 everytime I solve it, but apparently this is wrong. Can you please show me the steps? :/

asked by Mary on March 21, 2013
19. ## Trigonometry

The expression 2x^3(4-3x)-5x(x-2) is equal to? *Please show me the steps to solve this problem! Thanks!

asked by Katy on December 26, 2010
20. ## Math

Name 3 consecutive odd integers (X,X+2,X+4) The difference between 2X and X+4 =(X+2)-24 Can you show HOW to solve?

asked by Bob on May 24, 2013
21. ## algebra

Show all steps solve the equation 0.25r-0.125+0.5r=0.5+r

asked by tina on February 24, 2014
22. ## algebra

How to solve 5x - 3y equals 0 to determine if x and y show direct variation?

asked by Jordan on September 24, 2017
23. ## algebra

solve each exponential equation. Given the value for x 8^x=1/64 3^x=6 Can someone show me how to preform these. I would greatly appreciate it Thank You

asked by Mary on May 7, 2014
24. ## algebra

Using factoring and the zero-product property,please show how to solve the following problem: z(z-1)(z+3)=0 Thank you for your help.

asked by Jack on December 17, 2016
25. ## algebra 2

how can i solve this help please show the step 3square rood of 64x^4

asked by lisa on December 13, 2012
26. ## Math

solve the systems of equations algebraically. please show all your steps. y=x^2+2x y=3x+20

asked by Black Rose on April 28, 2016
27. ## Calculus

Show that the limit for [x^2cos(1/x)]=0 as x approaches 0. How would I solve this algebraically?

asked by John on September 21, 2010
28. ## math

Please show me how to solve: For what value of k are the graphs of 12y = -3x + 8 and 6y =kx - 5 parallel? For what value of k are they perpendicular?

asked by Jane on November 17, 2011
29. ## math 12

Could you please show me how to solve this question.If 2 cos A-1=0, where 0< or = A < 2pi what is A equal to?

asked by Tori on March 19, 2010
30. ## Algebra/Precalculus

How can I verify that f(x)=(x+3)/(x-2)and g(x)=(2x+3)/(x-1)are inverse functions (i.e. show the process)? Also, how can I solve (g o f)^-1, if f(x)=x+4 and g(x)=2x-5? Thanks!

asked by Ciera on September 30, 2013
31. ## Math

Which function includes the data set (0, -1), (2, 5), (5, 14)? Can you show me how to solve this? A) 3x-1 B) 2x+4 C) 2x+1 D) x+1

asked by Stacy on January 10, 2013
32. ## Maths

Solve for x: 5sin(2x) + cos(x) = -1.916 Can someone please show me the steps?

asked by Claire on October 17, 2010
33. ## mushi

Solve for d Spherical triangle whose parts are C = 89, a = 70°, b = 60° please show me ste

asked by adn on March 29, 2017
34. ## pre-algebra

Explain the basic method(steps) for graphing a linear equation. Can you give an example of a linear equation and show me how to graph the equation?

asked by Sherrie on November 19, 2011
35. ## English

When should a writer organize details from most important to least important? I have to write a paragraph on why I'm choosing the most-to-least method of organization over the other methods. I also have to state why I believe this method is the most

asked by anonymous on October 27, 2016
36. ## supervision

Give an example of how you would use this method to conduct a performance appraisal for an employee.Critical-incident appraisal method

asked by carmen on July 12, 2008
37. ## Java programming

A method can be directly or indirectly recursive and we will explore the differences. Discuss how and why would you trace a recursive method.

asked by Poohboi on January 2, 2018
38. ## physcology

The scientific method is very important to psychology. What other disciplines can you envision making practical use of the scientific method?

asked by bryan on March 12, 2009
39. ## Math

3P+(2-3P)>28 show work with answer please because I don't understand how to do this inequality.

asked by Angel on November 12, 2011
40. ## Math

4r=-32 Can you help show how the work is done. I got r=-8 Thank you I meant to put the minus in but I need help on the steps to get there.

asked by b6 on May 30, 2012
41. ## Math

For what value of b will the line y=-2x+b be tangent to the parabola y=3x^2+4x-1? Show work-2 marks

asked by Alex on January 15, 2015
42. ## math

how many weeks in 3 years, explain your answer.show the work

asked by robert on April 10, 2014
43. ## math

Identify the rate in the statement 52 is 26% of 200 show work

asked by shanae on November 6, 2007
44. ## math/algebra

Express 55 minutes as a fraction of 11/3 hours. Please show work

asked by logan on May 29, 2012

find derivative of: f(x)=e^2 I know that b/c e is a constant the answer is 0, but how do I show that in my work?

asked by erica on October 7, 2012
46. ## math

nine friends each get 1 half of a candybar. How many bars are there? show your work.

asked by rauline on March 14, 2015
47. ## Math help with Algebra

Divide (x^4-y^4) by (x-y). Need to show work to help me understand. Also need to answer without parentheses. Thanks for any and all help with this one!!

asked by TJ on November 13, 2009
48. ## geometry

B is the midpoint of Symbol for segment AC. AB=3x-6 BC=2x+2 What is the value of AB? Show your work for credit.

asked by Rob on May 9, 2010
49. ## Physics

convert 220 degree into radians show work.

asked by Anonymous on April 10, 2014
50. ## Precalculus(URGENT)

Number of possible turning points in the following equation f(x)=x^2(x-3)(x+4) show work please

asked by Arielt on March 11, 2010
51. ## Math

I'm not sure how I would show my work for this problem I know the answer is 9... 140 = (n-2)180 / n

asked by Punkie on December 6, 2009
52. ## math

4c=16 c=___ i know the answer but i have to show the work. It is complicated. pleeese help! 4c=16 4 4 c=4

asked by Alex on March 26, 2007
53. ## Math

A) 2y=√5y+6. Show your work on how you solved it and checked to see if it was right. I know the answer is y=2, but I do not know how to get that. So, If anyone could help me that would be amazing. Thank you!

asked by Tia on April 21, 2015
54. ## math

find a value between the numbers 1/4 and 1/3 please show work. (it can be any value but it has to be a fraction or a decimal)

asked by Anonymous on June 22, 2011
55. ## Math

z+1/z=2; z=? (1/z is a fraction) Please show work. I got C.1 as my answer. A.Square root of 3 B.1/2 C.1 D.1 1/2 E.2

asked by Johnny on April 18, 2014
56. ## math- surface and volume

If volume increases by 60%, how much does the surface increase by? Please show work.

asked by kate on October 13, 2012
57. ## algebra

convert to a logarithmic equation:8^y=4096 Please show work.

asked by math help on December 5, 2010
58. ## math

For what value of b will the line y=-2x+b be tangent to the parabola y=3x^2+4x-1 ? (Show your work - 2 marks)

asked by Alex on January 23, 2015
59. ## math

For what value of b will the line y=-2x+b be tangent to the parabola y=3x^2+4x-1 ? (Show your work - 2 marks)

asked by Alex on January 23, 2015
60. ## math

1. If m∠BAC = 38° and m∠DEC = 100°, then what is the value of x? Explain and show all work.

asked by mh on December 31, 2012
61. ## Math Log

How do you find log20, if log2=.301?? Please show work

asked by beyonce knowles on February 9, 2012
62. ## math

What is the maturity value of a loan for \$39,995 at 2.49% for 60 months? Please show work

asked by Dena on December 8, 2014
63. ## Algebra 2

Solving Systems of Equations in Three Variables: 3x+3y-z=-3 -2x-3y+2z=3 x-6y+3z=0 PLease show work

asked by Stephy on November 9, 2014
64. ## 7th grade

Simplify each of the following expressions using the distributive property. need help please show work 5(x+y) -3(5+t)

asked by Henry on September 8, 2010
65. ## Math(HELP!!!) PLEASE

How would you convert 1.5 square iles to dm^2?? I don't know how to show my work for this particular one.

asked by John on September 23, 2015
66. ## calculus

find the horizontal tangents of the curve and show work y=5x^3-3x^5

asked by Millie on October 12, 2011
67. ## algebra

What is the value of the expression below? |-4-5| - |7+3| Show work please or else I won't understand and confused :)

asked by Cookie on March 16, 2015
68. ## math

true or false: [-8]+=[-8+3] show work or explain answer please.

asked by annonoumus on September 4, 2008
69. ## need physics help

d=2.1 a=? vi=0 and t=.60 and i have to use the formula d=vit+1/2at^2, how do i do this? can you please show work so i can understand.

asked by mike on November 28, 2010
70. ## Chemistry

Balance and classify (show work ) LiOH + Fe (NO3)3 ->>>

asked by Maria on March 26, 2019
71. ## Math Help

Find the inverse of the following function algebraically. Show all work. f(x)=-5√-4x+4+2

asked by Robert on October 4, 2014
72. ## math

what is 750 pounds equal to in tons please show your work because i need help!!!!

asked by gaby on October 1, 2012
73. ## algebra

simplify show all work -6a-4a^2-2(10a^2+3a) evaluate -10+x divide by 2(9-x^2) for x=-6

asked by babygirl on September 4, 2011
74. ## TRIG

determine the sum of the first 100 even integers SHOW YOUR WORK

asked by Alex on May 11, 2013
75. ## Geometry

What is the pOH if the (OH-) is 1 x 10 -10 ? Please show your work? Plug the numbers into the formula

asked by Randy on September 24, 2015
76. ## TRIG

in an arithmetic sequence a1=4 and d=8 which term is 428 Show your work

asked by Alex on May 11, 2013
77. ## math

please show work divide 1/2 divided by1/8 need to see steps thanks

asked by shawnee on December 20, 2012
78. ## geometry

M is the midpoint of segment AB, AM=2x+4 and AB=12x+4. What is the value of MB? Show your work for credit.

asked by _ on July 31, 2009
79. ## Intermediate Algebra

Essay Question.Show all work.Find the difference.(3x^2-6x+8)-(-8x^2+x-4)

asked by sherry on April 4, 2012
80. ## Algebra 2

Solving Systems of Equations in Three Variables: 3x+4y+z=1 x+3y-z=-2 -2x+y-2z=-5 Please show work

asked by Stephy on November 9, 2014
81. ## Math

Simplify the following expression completely. Show your work. -2 (-y - 3) + 4y Answers: A. 6y -6 B. 6y + 6 C. 2y - 6 D. 2y + 6

asked by DionRimmings on January 29, 2016
82. ## Algebra 2

Solving By Factoring 6x^2-13x=-6 (x-8)(x-5)=x 4x(x-6)-x(x-2)=-24 Please show work I want to learn!!!!!!

asked by Clara on November 8, 2014
83. ## Algebra 2

Solving By Factoring 7p^2-50p=-7 Please show work for I could learn.

asked by Miguelina on November 8, 2014
84. ## algebra

40y/88 explain what steps you took to simplify and show your work

asked by keyanna on November 15, 2011
85. ## college algebra

write the expression as a single logarithm In(x/x-2)+In(x+2/x)-In(x^2-4) Please show work

asked by Ladybug on November 27, 2012
86. ## Maths

how would you work out y=2/x and y=-n/x the minus is for the whole fraction please show your working thanks in advance :)

asked by Greg on October 31, 2009
87. ## Write each expression using a single exponent.

Write each expression using a single exponent. 34.) 5^10/5^7 36.) 76^11/76^5 Please, Please, show work.

asked by InDireNeedOfHelp on June 6, 2014
88. ## chemistry

How many molecules of O2 are in a 3.5 liter container? How many atoms? Must show work.

asked by Anonymous on January 2, 2010
89. ## Rati and Rates Problems

1.Write two equivalent ratios for the given ratio. a. 4/12 b. 11/33 SHOW WORK

asked by kelly on November 14, 2011
90. ## Calculus 2

Find the area of the region. Please show work so I can understand. 2y=5x^(1/2),y=3,2y+4x=9

asked by Oscar on January 30, 2018
91. ## calculus

Find the derivative of the function. 1. 2x+5/3x-2 2. (1-x)(1+x^2)^-1 Please show work. TYVM. :)

asked by Matthew on September 11, 2011
92. ## math

Find the domain of the composite function f of g. f(x)=3/x-6; g(x)= 1/x please help and show the work as well.

asked by Bree on August 28, 2012
93. ## calculus

find the rate of change of f(x)=x^2+4 a. from -2 to 0 b. from 1 to 3 c. from -2 to 1 pllease show work

94. ## algebra 2 help please would appreciate

3+(2x/x+4) divide x/x+4 please simplify the complex fraction thank you show work

asked by lisa on November 9, 2013
95. ## algebra 2 help please would appreciate

4/x+5/y divide 3/x+7/y simplify complex fraction thank you show work

asked by lisa on November 9, 2013
96. ## MATH HELP!!!!!!

What would a 20% tip be on a \$32.10 bill at a restaurant? Show your work. Please help me with my homework.

asked by coolgirl on March 7, 2018
97. ## calculus

Find the distance d(P1,P2)between the points P1 and P2. P1=(-5,2) P2=(2,1) d(P1,P2)=? *all the 1's and 2's are to be lower down.* Please show work

asked by Lisa on January 1, 2013
98. ## Calculus

For the following function, state the derivative and evaluate f'(4): f(x) = x Please show your work! Thank you!!

asked by Labiba on February 25, 2012
99. ## Math Word Problems

If I have 12 brownies and Sue eats 2/3 of them, how many do I have left? Please show me the work.

asked by Kalelha on March 10, 2015
100. ## Intermediate Algebra

Essay: show all work. Find the quotient: 49a^2-b^2/7a-b

asked by brenda on May 22, 2012